Ground-breaker.



T. JIKIHARA.-

GROUND BREAKER.

APPLICATION FILED 1mm mu Patented J an. 28, 1913.

l TOSHII-IEI JIKIHARA, OFEUPLAND, CALIFQRNIA.

GROUND-BREAKER.

Specification of Letters Patent.

Patented Jan. 28, 1913.

.Application filed January 29, 1912. Serial No. 674,146.

To all whom it may concern:

Be it known that l, Tosmmiu JEKIHARA, a citizen of Japan, res' ling atUpland, in the county of San Bornardlno, State of Cal1- foruia, haveinvented new and useful Improvements in Gri'iund-Breakers, of which the'l'ollowin is a specification.

'lhis invention relates to a ground breaiia lug, plowing or cultivating;device especially adaptelil for working in rough hard soil or in stonyground and my invention is useful not only for breaking ground orfields, but also for street work, grading and excavation and the like.

Broadly considered, my invention oon in an. axle suitably supported, sayon wheels, and one or more weighted shares pivoted on the i do so as torise and fall over large boulder The construetioiii is such that theshares will be kept in the soil to put )erly break the ground exceptwhere they come in contact- With portions of the soil which isimpossible to lurcalc; when they will rise over the oltistacle withoutstopping' the prqre o of the machine over the .iicld, or without inuring the machine. The peculiar construction which allows of theseoperations. will be explained in the following specification, and areillustrated in the aceol'npauying drawings, in wliioh- Figure 1 is n plan View of my improved jllV in Fig. 2 is a side elevation of the same.

In the drawings 5 designatltes a suitable axle supported on wheels 6 andto which a draft tongue 7 is attached through the medium of members 8.This construction, so far explained, is more or less common toagricultural implements.

Loosely pivoted on the shaft is a plurality of rearwardly extendingframes '20 of the general configuration showirin Figs. 1 and 2. in theaccompanying drawings I have shown. these frames as being three in.number; but it is may be used. Each frame is so mounted on the shafttluit it may independently more thereon in a vertiml plane. iraccc aresupplied for holding the members 20 in proper position. liluch of theframes 20 is curved downwardly at its rear end, as at and then forwardlyus at 23. ()n the portion each frame carries a suitable obvious that anyniu'nber share 24 which may be of any desired con figuration. ordifferent classes of Work these shares may be changed.

The frames 20 are constructed of heavy solid iron and are therebyindividually weighted, as with suitable Weights secured by pins 31., soas to force their shares down in to the soil. The weight of the frames,and the position of the ground breaking shares, cause the share to diginto the soil. But each share may individually rise in case itencounter; any hard substance, such as a large bimldcr. The shape of theframes is such that, although ordinarily the shares are held beneath thesurface of the soil, they will ride up over any hard substance whichmight stop the pro rcss of the "round breaker, or which might injure it.T e p170- portions and configurations shown are adapted very well forbreaking hard soil or stony ground for cultivation. Where the soil isparticularly hard I may place an indir'ulual weight on each of theframes 20; but the :l'ranus are not thereby prevented from actingindividually. This individual action of each. share is the importantfeature of my device It allows a single share to ride up over anobstruction without stopping the progress of the ground breaker over thesurface and without interfering with the operation of the other shares.

it will noticed that the central beam 01' frame 20 is shorter than thetwo outer ones,

the central share 24 being ahead of the other two. This provides thatall boulders encountered shall be thrown out to either one side or theother of the breaker; if the central share were behind the other twothere would be formed a pocket which boulders, would catch and drag.

Having described my invention, I claim:

A device of the character described, consisting of an axle, supportingwheels therefor, draft means attached. to the axle, Hirer spaced beamsiiulependentl directly pivoted on the axle and extencing horizontallyrenrwardly a considerable distance therefrom, each of said beamscurvlng'dowm. wardly and then forwardly at their rear ends, the rear endof the central beam bein Y forward of the ends of the other two, a soilengaging share on the rear end of each beam, the angle of the sharebeing such that its forward movement in the soil causes it to sinktherein and the horizontal distance from the pivotal axle t0 the pointof the share being greater than the vertical distance between the axleand that point, and weights on the beams to force the share down intothe soil. substantially as setforth.

In witness that 1 claim the foregoin I have hereunto subscribed my namethis 20th day of January 1912. 1.

TOSHIHEI JIKIHARA. Witnesses Com E. MONTGOMERY, JAMES T. BARKELEW.

